126355391 has 4 divisors (see below), whose sum is σ = 126438000. Its totient is φ = 126272784.

The previous prime is 126355381. The next prime is 126355393. The reversal of 126355391 is 193553621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126355391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126355393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38966 + ... + 42083.

It is an arithmetic number, because the mean of its divisors is an integer number (31609500).

Almost surely, 2^126355391 is an apocalyptic number.

126355391 is a deficient number, since it is larger than the sum of its proper divisors (82609).

126355391 is an equidigital number, since it uses as much as digits as its factorization.

126355391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82608.

The product of its digits is 24300, while the sum is 35.

The square root of 126355391 is about 11240.7913867307. The cubic root of 126355391 is about 501.8006952085.

The spelling of 126355391 in words is "one hundred twenty-six million, three hundred fifty-five thousand, three hundred ninety-one".